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#include "MultiMC.h"
#include "CacheDownload.h"
#include <pathutils.h>
#include <QCryptographicHash>
#include <QFileInfo>
#include <QDateTime>
#include <QDebug>
CacheDownload::CacheDownload(QUrl url, MetaEntryPtr entry)
: Download(), md5sum(QCryptographicHash::Md5)
{
m_url = url;
m_entry = entry;
m_target_path = entry->getFullPath();
m_status = Job_NotStarted;
m_opened_for_saving = false;
}
void CacheDownload::start()
{
if (!m_entry->stale)
{
emit succeeded(index_within_job);
return;
}
m_output_file.setFileName(m_target_path);
// if there already is a file and md5 checking is in effect and it can be opened
if (!ensureFilePathExists(m_target_path))
{
emit failed(index_within_job);
return;
}
qDebug() << "Downloading " << m_url.toString();
QNetworkRequest request(m_url);
request.setRawHeader(QString("If-None-Match").toLatin1(), m_entry->etag.toLatin1());
auto worker = MMC->qnam();
QNetworkReply *rep = worker->get(request);
m_reply = QSharedPointer<QNetworkReply>(rep, &QObject::deleteLater);
connect(rep, SIGNAL(downloadProgress(qint64, qint64)),
SLOT(downloadProgress(qint64, qint64)));
connect(rep, SIGNAL(finished()), SLOT(downloadFinished()));
connect(rep, SIGNAL(error(QNetworkReply::NetworkError)),
SLOT(downloadError(QNetworkReply::NetworkError)));
connect(rep, SIGNAL(readyRead()), SLOT(downloadReadyRead()));
}
void CacheDownload::downloadProgress(qint64 bytesReceived, qint64 bytesTotal)
{
emit progress(index_within_job, bytesReceived, bytesTotal);
}
void CacheDownload::downloadError(QNetworkReply::NetworkError error)
{
// error happened during download.
// TODO: log the reason why
m_status = Job_Failed;
}
void CacheDownload::downloadFinished()
{
// if the download succeeded
if (m_status != Job_Failed)
{
// nothing went wrong...
m_status = Job_Finished;
if (m_opened_for_saving)
{
// save the data to the downloadable if we aren't saving to file
m_output_file.close();
m_entry->md5sum = md5sum.result().toHex().constData();
}
else
{
if (m_output_file.open(QIODevice::ReadOnly))
{
m_entry->md5sum =
QCryptographicHash::hash(m_output_file.readAll(), QCryptographicHash::Md5)
.toHex()
.constData();
m_output_file.close();
}
}
QFileInfo output_file_info(m_target_path);
m_entry->etag = m_reply->rawHeader("ETag").constData();
m_entry->last_changed_timestamp =
output_file_info.lastModified().toUTC().toMSecsSinceEpoch();
m_entry->stale = false;
MMC->metacache()->updateEntry(m_entry);
m_reply.clear();
emit succeeded(index_within_job);
return;
}
// else the download failed
else
{
m_output_file.close();
m_output_file.remove();
m_reply.clear();
emit failed(index_within_job);
return;
}
}
void CacheDownload::downloadReadyRead()
{
if (!m_opened_for_saving)
{
if (!m_output_file.open(QIODevice::WriteOnly))
{
/*
* Can't open the file... the job failed
*/
m_reply->abort();
emit failed(index_within_job);
return;
}
m_opened_for_saving = true;
}
QByteArray ba = m_reply->readAll();
md5sum.addData(ba);
m_output_file.write(ba);
}
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